This circuit of a Popular Electronics is intended to control a wiper. The circuit consists of a relaxation oscillator with unusual component. The relay must be sensitive.
We found this circuit in a publication for radio amateurs in 1974. The bipolar transistors can be...
Found in a 1980s American documentation, this circuit has a current consumption of only 1 mA. The...
This adjustable power supply was found in Ferranti's transistor manual from 1974. Power...